package chapter7.interceptor;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import chapter7.entity.User;
public class LoginInterceptor implements HandlerInterceptor{
    @Override
    public boolean preHandle(HttpServletRequest req,
                             HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = req.getSession();
        User user = (User)session.getAttribute("USER_SESSION");
        if(user==null){
            req.getRequestDispatcher("loginview").forward(req, response);
            return false;
        }else{
            return true;
        }
    }
    @Override
    public void postHandle(HttpServletRequest request,
                           HttpServletResponse response, Object handler,
                           ModelAndView modelAndView) throws Exception {
    }
    @Override
    public void afterCompletion(HttpServletRequest request,
                                HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
    }
}
